8results about How to "Reduced isolation" patented technology

The application provides a multi-frequency antenna and a communication device. The multi-frequency antenna comprises a reflecting plate, a first radiating unit and a second radiating unit, the first radiating unit and the second radiating unit are arranged on one side of the reflecting plate, and the first radiating unit is located between the reflecting plate and the second radiating unit. The first radiating unit comprises a first radiating part and a metal plate, and the metal plate is located between the first radiating part and the second radiating unit. The second radiating unit comprises a second radiating part and a metal ring, and the metal ring is located between the second radiating part and the metal plate. When the above structure is adopted, the size of the multi-frequency antenna as a whole can be reduced, and the first frequency band and the second frequency band have high isolation, so that the two frequency bands can work independently, the multi-frequency antenna can meet the miniaturization demand of the common antenna surface, the antenna works stably, and the efficiency is high.

This utility model discloses a tool grinding machine robotic arm loading and unloading device, including a grinding machine, a vertical plate fixedly connected to the upper side of the grinding machine, a grinding component disposed on one side of the vertical plate, and a support block fixedly connected to the upper side of the grinding machine and outside the grinding component. A sliding groove is formed on the upper side of the support block, and a protective frame is slidably fitted onto the inner wall of the sliding groove. This utility model, by incorporating a loading front arm, a limiting rod, a force-generating toothed plate, and a linkage component, allows the rotation of the loading front arm during loading to open the protective frame without affecting the movement of the clamping component. After loading is complete, the rotation of the loading rear arm during unloading again controls the seal between the protective frame and the sealing plate, achieving a sealed grinding space. This reduces dust generated during grinding, maintains a good working environment, reduces damage to the loading front and rear arms from debris, and improves the service life of the structure and the production environment.

The utility model discloses an on-line adjustable dead steam recovery device which comprises an injection pump, an auxiliary mechanism is arranged on the surface of the injection pump, a filtering mechanism is arranged at the connecting end of the injection pump, through the auxiliary mechanism arranged on the injection pump, rapid installation and accurate positioning are achieved, heat loss is effectively reduced, and the service life of the injection pump is prolonged. The sealing performance and the integrity of the heat preservation cover are enhanced, it is ensured that heat is effectively isolated in the heat preservation cover, the heat loss of a working medium in the transmission process is reduced, the dead steam recovery efficiency is remarkably improved, and it is ensured that equipment can stably and efficiently operate under various working conditions; the jet pump has the advantages that dead steam entering the jet pump can be filtered in a multi-stage manner and is prevented from entering the pump body to cause blockage, the dead steam entering the pump body is pure and free of impurities, and components in the jet pump are effectively protected, so that the reliability of equipment is improved, the service life of the equipment is prolonged, the equipment failure maintenance frequency caused by the impurities is reduced, and the maintenance cost is reduced.

The utility model provides a novel anti-corrosion and anti-abnormal-sound automobile door limiter, which belongs to the technical field of automobile manufacturing and comprises a limiting arm, a metal limiting box, a metal stop pin, a nylon plastic-coated shell, a plastic cover cap and a water baffle. Wherein the metal limiting box is arranged on the limiting arm in a penetrating manner; the metal stop pin is arranged at one end of the limiting arm; the nylon plastic-coated shell is arranged on the metal stop pin and used for protecting the metal stop pin, and the nylon plastic-coated shell has the functions of shock absorption and noise reduction; the plastic cover covers the metal limiting box and is used for protecting the metal limiting box, and the plastic cover and the nylon plastic-coated shell isolate abnormal sound generated by direct contact and collision between the metal stop pin and the metal limiting box; and the water baffle is fixedly connected with the plastic cover cap and shields the top of the limiting arm. According to the limiter, direct contact and collision between the metal stop pin and the metal limiting box can be avoided, abnormal sound generated by direct collision of metal parts is eliminated, and the overall corrosion-resistant effect of the limiter is improved.

The application relates to the technical field of radio frequency microwave devices, in particular to a W-waveband wide-frequency RF MEMS multi-blade multi-pole switch which comprises a silicon substrate, a plurality of input / output ports and a MEMS cantilever beam switch unit, the MEMS cantilever beam switch unit is provided with a driving electrode, and the communication and disconnection of the radio frequency signal path between the corresponding input port and the output port can be controlled by applying voltage to the driving electrode. The application realizes the on-off of the radio frequency signal path by electrostatic driving control of the deformation of the cantilever beam, and the driving mode has the advantages of low power consumption, high speed and easy integration. Compared with the common single-blade structure, the application can realize more complex signal routing in a compact unit, improves the system integration and functional flexibility, realizes interference-free crossing by using the slot structure through the horizontal swing type structure and the vertical lifting type structure, significantly reduces the high-frequency parasitic effect, and ensures the transmission quality of the millimeter wave signal in the W waveband.

The utility model discloses a road drainage structure which is characterized in that a plurality of road edge stone drainage structures are arranged between a road and a green belt, a water accumulation pool (5) is arranged at the end or the middle of each road edge stone drainage structure (3), each road edge stone drainage structure (3) comprises a road edge stone, a drainage hole penetrating through the road edge stone front and back is formed in the road edge stone, and a back plate is arranged on the back side of the road edge stone. A U-shaped drainage ditch is formed between the road edge stone and the back plate, a step is arranged above the drainage ditch, the height of the step is lower than that of the back plate, a positioning hole is formed in the step, a partition plate (4) with leakage holes is buckled on the step, positioning columns are arranged below four feet of the partition plate and are fixed through the positioning holes, and the positioning hole of the drainage structure of the road edge stone is formed in the middle of the step. And the adjacent curbstone drainage structures are connected after the clapboards are buckled. According to the technical scheme, the integrity and the sealing performance of the drainage structure are enhanced, construction is efficient and convenient, and therefore the prison break risk is reduced, mice are effectively isolated, the environment is optimized, and neatness and attractiveness are achieved.

In a first frequency band for FDD constituted by a first downlink operating frequency band and a first uplink operating frequency band and a second frequency band for FDD constituted by a second downlink operating frequency band and a second uplink operating frequency band, from the low frequency side, the positions of the frequency bands are in the order of (1) the first downlink operating frequency band, the second downlink operating frequency band, the first uplink operating frequency band, and the second uplink operating frequency band, the frequency range of the first uplink operating frequency band and the frequency range of the second uplink operating frequency band do not overlap, and a filter (11) is formed on a first substrate having piezoelectricity, having a passband including the first uplink operating frequency band and the second uplink operating frequency band.

This invention discloses an optical path system for an optical switch, comprising: a first single-axis crystal, a second single-axis crystal, a polarization combining prism, a total internal reflection prism, a first fiber collimator, a second fiber collimator, a third fiber collimator, a motor, and a motor controller; both the first and second single-axis crystals are cylindrical and placed with their optical axes aligned; the polarization combining prism and the total internal reflection prism are applied to radially symmetrical positions on the exit circular surface of the second single-axis crystal, and the two prisms are placed perpendicularly, with the polarization combining prism on top and the total internal reflection prism on the bottom; the first fiber collimator is located at the input end on the incident circular surface of the first single-axis crystal, the second fiber collimator is located at the output end on the exit circular surface of the second single-axis crystal, and the third fiber collimator is located at the output end of the polarization combining prism; the motor controller is used to control the rotation of the motor, thereby controlling the rotation of the second single-axis crystal.